(Feature) Show list of registeded addresses

[garatortiz]

Depends on #100.

• Add a list of addresses registered with the current account
• Add a remove button to allow the user to remove a registered address
• Show which addresses are already confirmed

[coveralls]

Pull Request Test Coverage Report for Build 298

• 16 of 63 (25.4%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-1.2%) to 71.846%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
web-dapp/src/components/App.js	0	1	0.0%
web-dapp/src/components/MyAddressesPage.js	2	48	4.17%
<!--	Total:	16	63	25.4%	-->

Totals
Change from base Build 280:	-1.2%
Covered Lines:	830
Relevant Lines:	1109

---

💛 - Coveralls

[fvictorio]

@Janther I added an unregisterAddress method to the PoPA contract for the feature of removing registered addresses. Please take a look at it and tell me if you think that approach will work.

[garatortiz]

[fvictorio]

This is in a stable point right now, I think we can merge it and do the pending things (improving the styles and whatever issue we find later) in separate PRs.

[phahulin]

After #95 popa.userAddressesCount should be changed to popa.userSubmittedAddressesCount

[fvictorio]

After #95 popa.userAddressesCount should be changed to popa.userSubmittedAddressesCount

Fixed, thanks.